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    ZINC SILICATE PHOSPHOR PARTICLES AND METHOD FOR MAKING THEM
    1.
    发明专利
    ZINC SILICATE PHOSPHOR PARTICLES AND METHOD FOR MAKING THEM 未知

    公开(公告)号：CA1184024A

    公开(公告)日：1985-03-19

    申请号：CA399145

    申请日：1982-03-23

    Applicant: IBM

    Inventor： BROWNLOW JAMES M ,  CHANG IFAY F

    IPC: C09K11/00 ,  C09K11/02 ,  C09K11/08 ,  C09K11/54 ,  H01J29/20 ,  C09K11/10

    Abstract: YO981-026 IMPROVED ZINC SILICATE PHOSPHOR PARTICLES AND METHOD FOR MAKING THEM Improved zinc silicate phosphor particles are made by using silicic acid particles in the range from 0.7 to 10 micrometers coated with Mn2O3?xH2O and then a layer of ZnO particles about an order of magnitude smaller which are fired to form the phosphors. The particle size is held within the range preferred and preferably is even narrower. The particles are not milled or mechanically crushed. Instead, the ZnO powder prevents agglomeration during firing. Baths are provided for formation of the particles prior to firing. Brightness and persistence are improved over conventional phosphors.

    3.
    发明专利
    未知

    公开(公告)号：DE69416238D1

    公开(公告)日：1999-03-11

    申请号：DE69416238

    申请日：1994-09-19

    Applicant: IBM

    Inventor： CHANG IFAY F ,  CHEN CHENGJUN JULIAN

    IPC: G06F3/042 ,  G06F3/041 ,  G06K11/08

    Abstract: The present invention comprises a standard CRT that has a light source provided by two strips of light patterns in the unused area of the CRT screen, typically at the right and left margins. In a preferred embodiment, the light patterns are created by a simple electronic circuit that is used in conjunction with the raster scan of the screen. No external light sources are required. The light patterns are created in a novel way in that they have a unique pattern frequency which is determined by causing the raster scan to create a point of light at the margins during certain raster cycles but not during others. The light pattern frequency is selected to be easily discriminated, such that the environmental disturbance and the signal from the CRT itself can be completely rejected. The light patterns are reflected from the unused areas of the CRT screen by reflective surfaces. The reflective surfaces are positions in proximity to the strips of light patterns and reflect the light across the surface of the CRT. Four single photodetectors located at the four corners of the CRT screen are used as detectors to monitor the reflected light. A pointer positioned on or near the surface of the CRT will block the light in such a way that two or more of the sensors can provide enough information to determine the pointer position by using geometry.

    4.
    发明专利
    未知

    公开(公告)号：AT176344T

    公开(公告)日：1999-02-15

    申请号：AT94114713

    申请日：1994-09-19

    Applicant: IBM

    Inventor： CHANG IFAY F ,  CHEN CHENGJUN JULIAN

    IPC: G06F3/042 ,  G06F3/041 ,  G06K11/08

    Abstract: The present invention comprises a standard CRT that has a light source provided by two strips of light patterns in the unused area of the CRT screen, typically at the right and left margins. In a preferred embodiment, the light patterns are created by a simple electronic circuit that is used in conjunction with the raster scan of the screen. No external light sources are required. The light patterns are created in a novel way in that they have a unique pattern frequency which is determined by causing the raster scan to create a point of light at the margins during certain raster cycles but not during others. The light pattern frequency is selected to be easily discriminated, such that the environmental disturbance and the signal from the CRT itself can be completely rejected. The light patterns are reflected from the unused areas of the CRT screen by reflective surfaces. The reflective surfaces are positions in proximity to the strips of light patterns and reflect the light across the surface of the CRT. Four single photodetectors located at the four corners of the CRT screen are used as detectors to monitor the reflected light. A pointer positioned on or near the surface of the CRT will block the light in such a way that two or more of the sensors can provide enough information to determine the pointer position by using geometry.

    MULTISTABLE CATHODE RAY TYPE STORAGE DISPLAY DEVICE
    6.
    发明专利
    MULTISTABLE CATHODE RAY TYPE STORAGE DISPLAY DEVICE 未知

    公开(公告)号：CA1101125A

    公开(公告)日：1981-05-12

    申请号：CA299859

    申请日：1978-03-28

    Applicant: IBM

    Inventor： CHANG IFAY F

    IPC: H01J31/08 ,  G09F13/22 ,  H01J29/18 ,  H01J31/12 ,  H05B33/00 ,  H05B33/22 ,  H01J31/06 ,  H01J31/58

    Abstract: AN IMPROVED MULTISTABLE CATHODE RAY TYPE STORAGE DISPLAY DEVICE of the Invention A multistable or memory electron beam addressed electroluminescent display panel is provided. The display panel is electron beam activated in the presence of an A. C. field, without the need of prior art flood guns. The panel may be activated or switched by direct electron beam activation of an electroluminescent film or by electron beam induced light radiation from a cathodoluminescent layer or from an insulating layer.

    9.
    发明专利
    未知

    公开(公告)号：DE69416238T2

    公开(公告)日：1999-09-02

    申请号：DE69416238

    申请日：1994-09-19

    Applicant: IBM

    Inventor： CHANG IFAY F ,  CHEN CHENGJUN JULIAN

    IPC: G06F3/042 ,  G06F3/041 ,  G06K11/08

    Abstract: The present invention comprises a standard CRT that has a light source provided by two strips of light patterns in the unused area of the CRT screen, typically at the right and left margins. In a preferred embodiment, the light patterns are created by a simple electronic circuit that is used in conjunction with the raster scan of the screen. No external light sources are required. The light patterns are created in a novel way in that they have a unique pattern frequency which is determined by causing the raster scan to create a point of light at the margins during certain raster cycles but not during others. The light pattern frequency is selected to be easily discriminated, such that the environmental disturbance and the signal from the CRT itself can be completely rejected. The light patterns are reflected from the unused areas of the CRT screen by reflective surfaces. The reflective surfaces are positions in proximity to the strips of light patterns and reflect the light across the surface of the CRT. Four single photodetectors located at the four corners of the CRT screen are used as detectors to monitor the reflected light. A pointer positioned on or near the surface of the CRT will block the light in such a way that two or more of the sensors can provide enough information to determine the pointer position by using geometry.

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